show window

void show(int x, int y, int width, int height, char color)
{
  for(int i = x; i < x + width; ++i)
  {
    for(int j = y; j < y + height; ++j)
    {
      screen.plot(i, j, color);
    }
  }
}

show(100, 30, 3, 4, 'r'); // show a red window in (100, 30) with width 3 and height 4